Re: drive type

On 12/31/2012 9:33 AM, Roedy Green wrote:


Supported?

Write some C code and access it via JNI.

Unsupported, may break any time, completely OS and
Java implementation dependent, try something like
this:

import java.io.IOException;
import java.lang.reflect.Field;
import java.nio.file.Files;
import java.nio.file.Paths;

public class Storagedetails {
    public static void dump(String indent, Object o) throws
IllegalArgumentException, IllegalAccessException {
        for(Field f : o.getClass().getDeclaredFields()) {
            System.out.print(indent + f.getName() + " : " + f.getType().getName());
            f.setAccessible(true);
            Object o2 = f.get(o);
            if(o2.getClass().getPackage().getName().startsWith("java.lang")) {
                System.out.println(" = " + o2);
            } else {
                System.out.println();
                dump(indent + " ", o2);
            }
        }
    }
    public static void fsdump(String pathstr) throws IOException,
IllegalArgumentException, IllegalAccessException {
        dump("", Files.getFileStore(Paths.get(pathstr)));
    }
    public static void main(String[] args) throws Exception {
        fsdump("C:\\");
    }
}

On my Windows 7 it outputs:

root : java.lang.String = C:\
volInfo : sun.nio.fs.WindowsNativeDispatcher$VolumeInformation
   fileSystemName : java.lang.String = NTFS
   volumeName : java.lang.String = ARNEPC4
   volumeSerialNumber : int = -126338268
   flags : int = 65470719
volType : int = 3
displayName : java.lang.String = ARNEPC4
$assertionsDisabled : boolean = true

Volume types probably match those in:
   http://msdn.microsoft.com/en-us/library/windows/desktop/aa364939.aspx

Go have fun with Linux, IBM Java and all the other combinations.

:-)

Arne